11 INDUSTRIAL EQUIPMENT, NAMELY, WATER AND LIQUID COOLING UNITS, WATER HEATERS, HEAT EXCHANGERS, FUEL ECONOMIZERS, EVAPORATORS, GAS SCRUBBERS, GAS FILTERING UNITS, WATER PURIFYING UNITS, HEAT REGENERATORS, STEAM ACCUMULATORS, AIR CONDITIONERS, ELECTRIC VENTILATING UNITS, GAS FILTERING UNITS FOR DOMESTIC USE